“Morbidity” is a very intriguing episode with something very disturbing lying beneath the surface of the “dancing bear” trouble and illness plaguing Haven. “Morbidity” begins with a haunting dream sequence. Someone is running through the woods, bodies are lying lifeless on the ground, “Croatoan” is carved into a tree, and a “thinnie” is wide open. When Dave (John Dunsworth) wakes up in a panic, infected leg throbbing, he calls an old friend for help. Meanwhile, Dwight (Adam Copeland) tries his best to stall the CDC’s Dr. Charlotte Cross (guest star Laura Mennell) from discovering the “troubles.”